When the tool is done, there will be a bug12345-redbg.zip folder in the
current directory. Upload this somewhere and give the UX person a link to that
zip file.

For the UX person

These instructions are for Gaia 1.2 and later. For Gaia 1.1 and before, see
the deprecated instructions at the end of this document.

Prerequisites

On your desktop: Firefox 26 or later. You may need to download
Firefox Aurora to get it.
The main point is to get a Firefox version with the App Manager. Go to
about:app-manager in the browser's location bar to see if you have
it in your desktop browser.

Note: If you flash Gaia, you will likely need to do the
Debugging Certified Apps
again. That preference is reset which each Gaia flash.

On your phone: Turn on Dev Tools access on the phone. In the phone's Settings app, go to the Developer option, near the very bottom of the list. Then in that settings area, the Debugging via USB option should be set to "ADB and DevTools"

Installing a dev snapshot of an app

The developer gives you an URL to a .zip file for the app.

Use your desktop Firefox to navigate to the zip file. Choose to save
the file to your desktop.

Open the folder on your desktop that has the downloaded zip file.

Double-click on the .zip file to unzip it. This should create a directory
in your downloads folder.

In the App Manager, be sure you are in the Apps section of the UI, and click the Add Packaged App link. Find the directory you just unzipped from the zip file.

Click the Update button in the App Manager UI to push the app over to your device (assuming you have already connected to the device via USB cable and the App Manager shows Connected to B2G in the lower left).

For the UX person (Gaia 1.1 and lower)

This section is deprecated, see the other UX section for how to work with
Gaia 1.2+.

Prerequisites

Make sure in your desktop Firefox, you have installed the
Firefox OS Simulator.
It is a large install, may take a moment.

Make sure you have a phone that has a Nightly build of Firefox OS. The
developer is likely using something like the Nightly build to test their
changes. If they have a specific version of B2G you should use to test, they
should tell you.

Make sure Remote Debugging is enabled on the phone. This is found on the
phone in the Settings app under: